Skip to main content

All Questions

Tagged with
Filter by
Sorted by
Tagged with
23 votes
10 answers
2k views

I (rev)?(pal)? the source code, you (rev)?(pal)? the input!

Just because the reverse and palindrome were not too challenging individually :) Write a program (full program or function) that satisfies the following: given a string input, the program as-is ...
Bubbler's user avatar
  • 79.1k
28 votes
28 answers
4k views

What's the Missing Code? (Cops)

Cops' Challenge Robbers' challenge here. It has now been four days since the challenge was posted so all new answers should be marked as non-competing in the title. These answers can still be cracked ...
Lecdi's user avatar
  • 1,165
13 votes
10 answers
1k views

From code to golf (Cops' thread)

This is a cops-and-robbers challenge, the robbers' thread is here You can change the word code into golf by changing a letter at ...
emanresu A's user avatar
  • 45.7k
10 votes
5 answers
540 views

The Most Palindromy Code to Calculate Palindromy Numbers

The string abaaba Is a palindrome, meaning it doesn't change when it's reversed. However we can split it in half to make two palindromes ...
Wheat Wizard's user avatar
  • 102k
27 votes
7 answers
2k views

Happy Birthday... caird coinheringaahing? ChartZ Belatedly?

When this question was posted, it was caird coinheringaahing's birthday! (source: 1, 2, 3, 4) (It was also World Emoji Day.) As a bit of some CGCC lore, caird's name came from a Jelly answer by Dennis ...
hyperneutrino's user avatar
  • 42.8k
10 votes
44 answers
3k views

Which character to change (Robbers)

Cops thread Robbers, your task is to crack a cops answer. Reveal the character that should be changed and what it should be changed to too. Please notify the cop if you cracked their challenge. The ...
math scat's user avatar
  • 9,518
20 votes
49 answers
4k views

Which character to change (Cops)

Robbers Thread Cops, your task is to chose a program that prints a string (you can choose). Although, if you change 1 character in your code, it should print another string. But there's a twist: You ...
math scat's user avatar
  • 9,518
4 votes
6 answers
634 views

I Rot-13 the source code, you Rot-19 the output!

This is alternate of a rip-off of a rip-off of a rip-off of a rip-off of a rip-off of a rip-off. Go upvote those! Your task, if you accept it, is to write a program/function that outputs/returns its ...
okie's user avatar
  • 1,807
19 votes
25 answers
3k views

I palindrome the source code, you palindrome the input!

This is a rip-off of a rip-off of a rip-off of a rip-off of a rip-off. Go upvote those! Your task, if you accept it, is to write a program/function that outputs/returns its input/args. The tricky ...
okie's user avatar
  • 1,807
-14 votes
15 answers
428 views

Reverse source code and double the input

For today's challenge you have to take an input, and if your source code is reversed, then the input should be printed doubled. Let's say your source code is ABC ...
user avatar
30 votes
38 answers
5k views

I uppercase the source code, you reverse the input!

It's one of these again :D Your task, if you wish to accept it, is to write a program/function (without any uppercase letters) that outputs/returns its string input/argument. The tricky part is that ...
rydwolf's user avatar
  • 19.3k
13 votes
3 answers
651 views

Writing erasable code

My phone number (which I will not be sharing here) has a neat property where there is a two digit number, which when iteratively removed from my phone number will eventually remove all the digits. ...
Wheat Wizard's user avatar
  • 102k
26 votes
10 answers
4k views

Your code has an uncanny mirror twin…

Write two programs, each taking a string s and a number n ≥ 0, such that: The first program prints ...
darrylyeo's user avatar
  • 7,947
28 votes
24 answers
7k views

I shift the source code, you shift the input!

Sandbox A spin-off of a rip-off of a rip-off of a rip-off of a rip-off. Go upvote those! Your task, if you accept it, is to write a program/function that outputs/returns its input/argument. The ...
lyxal's user avatar
  • 35.3k
11 votes
7 answers
535 views

A Change in Perspective

In this challenge you will write a piece of text which when viewed from two different angles will create two different programs. Your string as viewed from above must take a string containing only ...
Wheat Wizard's user avatar
  • 102k

15 30 50 per page